Computer network: brief introduction, TCP handshake and wave Database: Introduction to MySQL Data structure: Introduce several simple structures, how to determine whether there is a ring in a linked list Map implementation interface, expansion method, bottom layer implementation? 1. Given an integer array nums, find a continuous sub-array with the largest sum (the sub-array contains at least one element), and return the largest sum.
Example:
Input: [-2,1,-3,4,-1,2,1,-5,4]
Output: 6
Explanation: The sum of consecutive sub-arrays [4,-1,2,1] is the largest, which is 6.
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There are some irregular coins. Among these coins, pi represents the probability that the i-th coin will face up.
Please toss each coin once, and then return the probability that the number of coins facing up is equal to 5.
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